Cable-block system



Se t. 6,1927. ,641, 98

I C. J. SIEFARTH CABLE BLOCK SYSTEM 1 Filed Aug. 10. 1925 Patented Sept.6, 1927.

UNITED STATES PATENT OFFICE.

CHESTER J. SIEFARTH, OF PORTLAND, OREGON, ASSIGNOR TO WILLAMETTE IRON &STEEL WORKS, OF PORTLAND, OREGON, A CORPORATION OF OREGON.

CABLE-BLOCK SYSTEM.

Application filed August 10, 1925.

In many uses blocks have a tendency to twist, thus interfering with thefree running of the ropes or cables through the blocks. This isparticularly true where the blocks 5 are used for heavy cables, such ashigh leads, or sky line cables of logging systems. The present inventionis designed to provide means on blocks preventing the twisting of theblocks in their use. Features and details of the invention will appearfrom the specification and claims.

The invention is illustrated in the accompanying drawings as followsFig. 1 shows a side elevation of a top of 15 the mast showing a block,as a heel block, for

a standing line.

Fig. 2 a plan View of the block.

Fig. 3 a section on the line 33 in Fig. 1.

Fig. 4 a section on the line 4-4 in Fig. 1.

1 marks a mast such as is used in logging operations for carrying thesky line, 2 the guy lines for the mast, and 3 a standing line runningover sheaves 4 in a mast head 5. A

floating block 6 of the heel block system is secured to the standingline 3 and the an chored block 7 is provided with a shackle 8 which issecured by anchor cables 9 with anchor posts 10. The floating block hassheaves 11 and the anchor block 7 the sheaves 12 and the rope 13 is runthrough these sheaves in the usual manner. The free end of the rope iscarried around a sheave 14 carried in an extension 15 of the frame ofthe anchor block 7 and is carried through guide sheaves 16 in anextension frame 16 on the floating block 6. The heel block line is thencarried over a sheave 17 of the block 18 and to the heel block drum (notshown).

The sheave 17 is secured to the mast head by shackles 18. A heel blockslack line 19 extends from the floating block over a'sheave in the sameframe with the sheave 17.

tending from the sheave 14 through the Serial No. 49,325.

It will be noted that the anchor block is locked against turning and theline 13 ex guide sheave 16 when taut is sufiiciently below the main lineconnectlon to prevent any turning of the blocks 6 and 7 under strain orin use. Thus the blocks are maintained in an upright and free runningposition through all conditions of use.

While I have shown the heel block line merely passing through theextension 16 it will be understood that the guide sheaves 16 may beactually put under strain by a deflection of the cable and that they mayserve not only as a guiding extension but as a sheave maintaining thestress of such deflection.

What I claim as new is 1. In a cable block system,the combination of ananchor block; a floating block; sheaves in said blocks; off-set frameson said blocks; and a cable operating in said sheaves and through saidoff-set frames. H5

2. In a cableblock system, the combination of a block frame having ablock sheave therein; an off-set downwardly extending frame having acable guide therein; and a cable extending in an out of vertical direction around said sheave and through said guide and in a returndirection.

3. In a cable block system, the combination of a block frame having ablock sheave therein; an off-set downwardly extending 75 frame having acable guide therein; and a cable extending in an out of verticaldirection and operating on said sheave and returning through said guide.

In testimony whereof I have hereunto set my hand.

CHESTER J. SIEFARTH.

